Water-chamber for water-heating apparatus.



G. W. LAKE.

WATER CHAMBER FOR WATER HEATING APPARATUS.

APPLICATION FILED PBBA, 1914.

1 ,1 15,076. Patented Oct. 27, 1914.

fieozyeZz/Zake sat Wm UNITED STATES PATENT OFFICE.

GEORGE W. LAKE, OF RUMFORD, RHODE ISLAND, ASSIGNOR TO METACOMET CORPORA- TION, OF RUMFORD, RHODE ISLAND, A CORPORATION OF RHODE ISLAND.

WATER-QHAMBER FOR WATER-HEATING APPARATUS.

Specification of Letters Patent.

Patented Oct. 27, 191 4.

Application filed February 4, 1914. Serial No. 818,852.

To all whom it m 0 concern:

lle it known that I, Gnome W. Imus, a.

, quickly heated.

It. is found in practice that where this heating chamber is constructed of two separate plates soldered together that the heat from the burner acting upon the lower soldered edge soon melts and destroys the same and causes the chamber to leak. To obviate this difiiculty I have formed the chamber of a single piece of sheet metal and folded one portion over and back substantially upon itself, the folded edge being placed at the bottom where it is the hottest without detrimental effect.

A further object of the invention is to corrugatc one of the walls of the chamber longitudinally to provide a series of small water receiving tubes and also to render more effective the action of the heat on the walls of the chamber.

The invention further consists in bending these double walls into a series of transverse folds to render the body flexible whereby it may readily expand and yield to the action of heat and cold without injury.

A further object of the invention is to fold both the upper and lower portions of one of the walls over and back substantially upon itself, the edge of the upper portion being bent upward and the edge of the lower portion being bent downward forming interlocking lips united by solder forming a joint whereby if the Solder should melt, instead of running out and spoiling 'the joint, the solder would be retained within the upturned lip and as soon as cooled would again and automatically seal the joint.

A still further object of the invention is to provide rivets or stay members through the walls of each fold to prevent them from separating by action of excessive internal pressure. 'ith these and other objects in view, the invention consists of certain novel features of construction, as will be more fully described and particularly pointed out in the appended claims. ()f the accompanying drawings: Figure 1 is a sectional side elevation showing my improved heating chamber in position in a portable 'ater heater. Fig. 2 is an end view showing the multiple folds of my improved water heating chamber. Fig. 3 is a face view showing the general form of the sheet plate from which my heating chamber is constructed showing the plurality of longitudinal corrugations in one portion thereof. Fig. 4 is an edge view of the plate showing a portion of one of the folds partially in section. Fig. 5 is an enlarged view illus- -is a sectional edge view of one of the folds.

Fig. 7 is a detail illustrating the interlocking joint edges of the folded portions of the plate.

Referrin to the drawings, 10 designates a portable heater more particularly adapted for domestic use, and in which my improved water chamber 11 is mounted above the multiple gas burner 12, preferably of the Bunsen burner type. It. is found in practice that where a water chamber of this character is constructed of two separate pieces of sheet metal soldered together, that the lower edge, upon being exposed to the direct heat of the flame soon melts the solder and causes the chamber to leak. To' obviate this difficulty I have formed my improved water chamber of a single piece of sheet metal and have provided one of the walls 13 with a series of longtudinal corrugations, the general lay-out of which is best illustrated in Fig. 3. I then fold the lower section 14 upward on the dotted line 15 and the upper section 16 over and downward on the dotted line 17. I then turn upward the upper edge as at 18, see Fig. 7, and also turn downward thelower edge 19, and cause them to interlock one with the other, as illustrated in said figure, the same having been previously tinned or supplied with the requisite amount of soldering material. ll'then roll the folds of this joint together, and upon subjecting thesameto the proper amount of heat the solder is caused to flow and firmly unite the parts, as best illustrated at 19 in Fig. 5. This joint thus constructed is preferably located near the upper edge, see Fig. 6, or at a sufiicientdistance above the lower edge, or position of greatest heat, so as not to be affected and again unsoldered. llf,"however,

by any, accident, such as inadvertently shut;

ting off the supply of water, or other cause, an excessive heat should be applied to the water chamber and the solder in this joint should become melted, it could not run out of the trough-shaped groove, but would be retained therein and as soon as the chamber again cooled the joint would be again and automatically scaled. After this joint 19 has been formed the plate, which is now in a tubular form is rolled down fiat bringin the plain wall 14 and the corrugated wal nearly together, as illustrated in Figs. 5 and 6, then the stock at the ends 25 and 26 is.

folded over and inter-locked and permanently joined together by hardsolder. This double walled body is then preferably bent into a series of transverse folds, as illustrated-in Fig. 2, whereby thechamber is rendered yieldable, to readily expand and contract with the changing temperatures.

This folded chamber is set endwise into the casing of the heater by which construction it will be seen that the heat from the burner below passes up between each fold and in contact with both the corrugated wall and the plain wall of each fold throughout the whole length of the same. The corrugations or tubes retaining the water extend outward and have the efiect of horizontally disposed rlbs which engage and arrest the heat and thereby produce the maximum. effect to qulckly heat the water passing through the chamber;

A waterinlet pipe 20 is connected to the boss 21 on the lower side of the first fold and a water outlet pipe 22 is connected to the'boss 23 on the upper side of the last fold whereby the water enters at the bottom and as it passes back and forth through the dif- 1,1 more sure. To accomplish this. ll preferably insert a rivet 24:, see Fig. 5, or other tying member and solder the same in position.

llelaim: Y

1. In a device of the character described, the combination with a water chamber formed of a single piece of sheet metal having one of its walls corrugated longitudinally, the lower portion of the corrugated wall being folded over and back substantially upon itself forming a series of water retaining tubes, means for uniting the meeting edges of the folded portions. said double walls being bent into a series of transverse folds, an inlet pipe 'connectedto one end at the bottom and an outlet pipe connected to the opposite end at the top and a burner beneath the lower edge of t e chamber.

2. In a water heater, a Water chamber comprising a body formed of sheet metal having one of its'walls corrugated, both the upper and lower portions of said wall being folded over and back substantially upon itself, means for uniting the meeting edges of said folded portions, said double walls being bent into a series of transverse folds, and said plate being provided with inlet and outlet openings. I

3. In a water heater, a water chamber comprising a body formed of sheet metal having one of its Walls corrugated, both the upper and lower portions of said wall being folded over and back substantially upon itself, the edge of the upper'portion being bent upward and the edge of the lower fold being bent downward forming interlocking lips united by solder, said double walls being bent into a seriespf transverse folds and said plate being provided with inlet and outlet openings.

4. In a water heater, a water chamber comprising a body formed of a single piece of sheet metal having one of its walls corrugated, the lower portion of said wall being folded over and back substantially upon itself, means for uniting the meeting edges of the folded portions, means for tying together the opposite adjacent walls of said body at intervals, said double walls being bent into a series of transverse folds, and said plate being provided with inlet and outlet openings.

In testimony whereof I affix my signature in presence of two witnesses.

enonon w. nane.

Witnesses:

Howann E. BAnLow, E. l. Gender. 

